Posts: landscape and square
1600×900 works well for panoramic creatives. Square 1080×1080 is more flexible on mobile timelines.
In-image text: big and high-contrast; it shrinks hard on phones.
Size guide
X (Twitter) image sizes
On X the feed is fast: a bad crop looks sloppy in a second. Posts, header, and avatar do different jobs—don’t force one file to do all three.
Header and profile
The 1500×500 header crops by device. Keep the message centered. Circular avatars need margin.
Link cards
When sharing URLs, a ~1200×628 card helps the preview avoid stretching. SMALLADAPT includes a card-image preset.
X formats in SMALLADAPT
Frequently asked questions
X header size?
1500×500. Use the “Header” preset under platform X.
Best ratio for a photo post?
16:9 landscape or square usually look clean. Avoid extreme panoramas that clients compress oddly.